Tool for facing emery-wheels



(No Model.) J. D. HUNTINGTON..

. TOOL POR'FAOING EMERY WHEELS; NQ. 2'88,638.- V Patented Nov. 20, 1883.

Q@%Zj 2ffl44 WITNESSES: INVENT R ATTORNEY I UNITED STATES PATENT OFF CE.

JOSEPH n. HUNTINGTON, or CHICAGO, ILLINOIS.

Tool. FOR FACING EMERY-WHEELS.

SPECIFICATION forming part of Letters Patent No. 288,638, dated November 20, 1 883. 1

Application filed August 8, 1853. (X model To all whom it may concern:

Be it known that I, JosErII D. HUNTING- TON, of Chicago, in the county of Cook and State of---Illinois, have invented certain new and useful Improvements in Tools for Facing Emery-WVheels; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

One of the great difficulties to be overcome in the use of emery-grinding wheels is the re moval from their grinding-surfaces of a glaze which is formed by small particles of metal and grease, and the keeping of the grindingsurfaces thereof sharp, so that it will out! The object of my invention is to provide a tool to overcome the difficulties above set forth, and which will, moreover, be useful in turning the periphery of the emery-wheel when from use-or other cause it has become worn away more in one place than'another. This I accomplish by a number of spur-wheels or steel disks, or both conjointly, arranged-at an angle to each other on a shaft adjustable in a suitable head, from whichlatter extends a ban dle.

In the drawings, Figure l is a side elevation. Fig. 2 is an end or face view. Figs. 3 and 4 are detail views. Fig. 5 is a perpective view,

and Fig. 6 is a transverse section, on the line 00 w in Fig. 1.

I11 the drawings, A represents a head having downwardly-projecting fingers a. a, and having longitudinal slots b b and 0. Slot 0 is the central slot, and divides the head vertically, and slots 11 b are placed one on either side of slot 0,- and, at an angle thereto at right and left declination, respectively.

Passing laterally through the head A, and intersecting the slots 11 b and c, is an aperture, d, in which is placed a loose pin or shaft, B,

preferablyof a length a little less than the lateral dimensions of the head.

In order to prevent this shaft B from working or falling out,I close the side openings of the aperture d by small circular plates 6, pivoted and held which my invention is manipulated.

In using my improved tool the fingers are placed over and ride upon the crest of a suitable tool-rest, thus serving as the fulcrum, so that by raising or lowering the handle the cutting and scraping devicesviz., the spurwheel and disksare advanced or withdrawn from the periphery of the emery-wheel it is facing or truing. When in contact with the rapidlyfirevolving emery-wheel, the disks and spur-wheel acquire a speed of very many thousands of revolutions aminutc. Thus the spur- Wheel acts as a rotary pick, striking the periphcry of the emery-wheel with such force as to break away small particles of emery, and roughen or (what is known to the trade as) sharpen the same, so as. to promote its cutting ability. The engaging-surface of the disks, being at an angle to the perpendicular motion of the said emery-wheel,creates ascraping and cutting effect, thus removing the glazeviz. the accumulation of grease and emery and metal duston the grin din g-surface of the wheel, which, unless it is removed, impairs its grinding capacity.

It is known to me that there are tools now in use for facing emery-wheels, having alternate disks and spur-wheels placed vertically or at right angles on a shaft; but in these tools the ability to operate, as above set forth, depends upon the power the operator can exert to press the same against the wheel, and at the same time move it to the right and left alternately. I11 this tool the disks have only a straight perpendicular cut, rendering the lateral motion absolutely necessary, and, more over, when being moved laterally to one side or the other the disks and spur-wheels acquire an almost imperceptible obliqueness to its shaft in the direction of the lateral motion of the tool, which it is very difficult to overcome without removing it from contact with said wheel. These objections are overcome by my improved tool, which has the disks placed at the same angle in contrary directions 011 either side of the central and vertical spur-wheel, so that they counteract upon each other, very little effort of the operator being necessary to move it one direction or the other without removing it from contact with the emery-wheel.

I do not wish to be understood 'as limiting myself to the alternate use of disks and spur- -wheels, for either spur-wheels or disks alone for some classes of work may be preferable.

Moreover, it is obvious that the shaft B may be bent, so as to be at right angles to the inelinedcntting devices,w-i-thout departing from the spirit of my invention; but

What I claimas new, and desire to secure by Letters Patent, is-

shaft, substantially as set forth.

I11 testimony that I claim the foregoing as my own I hereunto affix my signature in presence of two witnesses.

JOSEPH D. HUNTINGTON. Vitnesses:

JAMES H. COYNE, FRANK D. THOMASON. 

